2109588809 has 2 divisors, whose sum is σ = 2109588810. Its totient is φ = 2109588808.

The previous prime is 2109588797. The next prime is 2109588841. The reversal of 2109588809 is 9088859012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1773673225 + 335915584 = 42115^2 + 18328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2109588809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2109581809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054794404 + 1054794405.

It is an arithmetic number, because the mean of its divisors is an integer number (1054794405).

Almost surely, 2^2109588809 is an apocalyptic number.

It is an amenable number.

2109588809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109588809 is an equidigital number, since it uses as much as digits as its factorization.

2109588809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 50.

The square root of 2109588809 is about 45930.2602757703. The cubic root of 2109588809 is about 1282.5252898914.

The spelling of 2109588809 in words is "two billion, one hundred nine million, five hundred eighty-eight thousand, eight hundred nine".